What many overlook is that using Rust has very high costs, but the edge over alternative languages is often only marginally - depending on the use case of course.

Those costs of Rust get in the way of developing the actual product. You loose speed, efficiency, but potentially gain no benefit to the users of your product.

Why should anyone choose Dioxus over Sveltekit, Next or Nuxt? I never had an issue with a frontend app that the borrow checker would have catched. Error handling was an issues some years ago but is solved by now when using one of those modern frameworks. (I don't know if Dioxus has error boundaries, though.)

Those Rust fullstack frameworks make sense only for people wanting to use Rust, not for people looking for the right tool for the job.

The same can be said for ordinary CRUD backends. Java, C#, Go and Typescript (Node, Deno or Bun) are all memory safe with good type systems and more than good enough performance. Evangelism around Rust is unfortunately still a thing. A good example is the latest hype in the community because some Google Manager said at a Rust conference that writing Rust is as fast as writing Go. Anyone having done more than a toy program in Rust and Go knows how wrong this statement is. The reasons are given in the article.